1998862216 has 16 divisors (see below), whose sum is σ = 4036164300. Its totient is φ = 922551744.

The previous prime is 1998862189. The next prime is 1998862249. The reversal of 1998862216 is 6122688991.

It can be written as a sum of positive squares in 2 ways, for example, as 1984346116 + 14516100 = 44546^2 + 3810^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9609811 + ... + 9610018.

Almost surely, 2^1998862216 is an apocalyptic number.

It is an amenable number.

1998862216 is an abundant number, since it is smaller than the sum of its proper divisors (2037302084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1998862216 is a wasteful number, since it uses less digits than its factorization.

1998862216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19219848 (or 19219844 counting only the distinct ones).

The product of its digits is 746496, while the sum is 52.

The square root of 1998862216 is about 44708.6369284504. The cubic root of 1998862216 is about 1259.6820849054.

The spelling of 1998862216 in words is "one billion, nine hundred ninety-eight million, eight hundred sixty-two thousand, two hundred sixteen".